Rules of Rotary Milling:

  • All geometry must be drawn in the XY plane
  • Only OD Rotary Milling is supported
  • No off-center rotary milling is supported

The part in this example shows two examples of engraving on an OD of a 2" cylinder. Download the part HERE.

Steps to recreate this part:

  1. Create a new GibbsCAM part file
  2. Set the machine type to 4 Axis Vertical Mill.
  3. Define your stock as X+ = 2, X- = -2, Y+ = 4, Y- = -4, Z+ = 2, Z- = -2
  4. Open the Workgroup window and right-click WG#1
  5. Set workgroup to Rotary Milling
  6. Create a new workgroup.
  7. Right-click on WG#2 and set it to Part Stock extruded along the Y axis
  8. Draw a 2" circle in WG #2
  9. Change to WG #1
  10. Using the Text Creation tool generate the text you wish to machine. Be sure to define the geometry at the correct Z-level. When drawing geometry for Rotary Milling it should always be drawn at the OD of the stock...This means all your geometry used for Rotary Milling will be drawn at a POSITIVE Z position.
  11. Apply a roughing or contouring toolpath to your geometry. Be sure to go to the Rotate tab and select Rotary Mill.

Special notes: Be sure to pay special attention to your depths and clearances. This is the #1 cause of problems when performing a rotary milling operation.